Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ba470fbcdfbcae…

MALICIOUS

PDF

68.4 KB Created: 2021-09-20 02:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: da927b54f66c9654f16b1d0a81dd30f0 SHA-1: 30b01d9e1b09692d6dbf2e1d1965eacc22face9f SHA-256: d6ba470fbcdfbcae2a480c04305a1ef5283affb3ea6232ac343d6f873855198a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The document contains a link farm with numerous distinct hosts, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and heuristics point towards an exploit or malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sanraimundo.cl/dyn/uploads/file/13900104751.pdf In PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/39412e4f6b4231ee2b8ee4425b6a4cbf/86027381322.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/24940092360.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65819109257.pdfIn PDF document text
    • https://vientangluc.com/upload/files/6629424418.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/fekalupavusizeda.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/malufidifu.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/55349577411.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/26546517074.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/kukuxe.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613294087a46b---29040534291.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/337428097612fafa8874ca.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/lonoxozipetosinosebetiliw.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/86741716861.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/52928019626.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/83828381622.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/88268676104.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/xogomorenidovotani.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-7/20210907190828458330.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/sarujanutezupawigatujim.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/disosigogow.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/jefosusifeluteraxulibup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=can+you+download+ios+on+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E8 10344 bytes
SHA-256: 3e0ab1767703756a7910f75cb434172cbc290ccbf193f740d398814498d7fb3e
font_01_sfnt_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 14192 bytes
SHA-256: 591414bff4f4f26c18c12ae52bedcc89f13d4be725999149b79021f72a324053